How to add new force in CFD-DEM model

MFiX How to
#1

Hi all,
In CFD-DEM model, I was trying to add more interaction forces of particle-particle and particle-wall on top of the built-in van der Waals (especially the electrostatic force to complete DLVO theory), I understand the main source code I need to modify is calc_force_dem.f, but I’m wondering how can I modify the corresponding udf files (or which one should I modify) to hook the implementation? Anybody who had related experience has any suggestions?
Thanks.

How to implement Coulomb force?
#2

You can copy the calc_force_dem.f to your project folder, modify it to include your own force and recompile.

#3

Yes that works, turned out I don’t have to worry about those udf. Thanks.